Film winding mechanism



Dec. 13, 1938. J. MlHALYl K FILM WINDING MECHANISM Filed May 29, 1937 i,IN VENT OR:

ldl 229771! IAL l MMM 'Zp M? ATTORNEYS.

Patented pecl 13 `193e i n 2,140,445

` L l A`v140.445* n .I j` .L

n wiNDlNaMECHANIsM 1 JosepligMihalyi,k Rochester, N. Y., assignor to y yi Eastman `Kodak Company, Rochester, N.y Y.,

a corporation of New Jersey N .f ,Application May ze, 1937, ,seiarNml145,497

. n m m' 11 claims. (crm-' urr, y.

This inventionlfrelates vto photography Fig.-3 isavsectiontakenv on line33.` of Fig. 2,

.more particularlytophotographic cameras.r One Iparts of the film retortbeingshown inelevation.

object of my invention is to provide a. vcameraof Fig. 4 is-.afragmentary sectional view showing the type in Whichlm is unwound fromasupply the rewinding handle in its operativeposition. 5 fspool to a.take-11p y.spool intermittently for ex- .H Fig.v 5 isafragmentary bottomplan View ShOW-` 5 posingthe various film sections after whichthe ingthe nlm rewinding handle in its inoperative iilmis reWound onv the,original .spool, ASuch .positiony .l i cameras Amayusel a iilnir retortin which the nlm r Many'` of the ycameras now on :the market of woundon`the supply spoolis made light-tight or theuso-called miniaturesizeusestandard 35 mm.

may use film spools of -thelmore usual .type in perforated motionpicture lm and this nlm islO whicha piece of backingpapcr or.otheropaque generally drawn, from a light-tight ylm retort materialisused 'torender/thefilm package'lightexposedin the camera, and then againreturned tight. Another object lof' my invention is to proto theretort-Lwhich encloses a supply nlm spool vide a camera in which both.the film v.winding Thistype ofelm is .also supplied on spools withl5`and rewiriding"operations are .automatic to the Out thel retort Vb utsincethis necessitates backing 15 extent that it is not necessaryliortheoperator paper being usedyand since.. the retorts form a to adjust Yanyclutch mechanisms.- kAnother obparticularly .Safe -DIO'feCtiOn iagainst'- light' leak; ject of mydnvention isto provide acamera with thelretort type Of lmS generally Preferred. two separate nlm Windingmechanisms',A `one for In thegfollowing specication and claims it iswindngnlm in one direction and the other for toflbe understood that,`where I'refer to a Supply 2o i winding lm in an opposite direction, andto pro#` spool, I am referring either. to a supply. spoolon videa meansfor automatically allowingthe oper.- which convolutionsl of iilm` andbacking -paper ationv of one off these Winding, mechanisms only areWound or a supply SDOOI which is enclosed in at fone time. Still anotherobject of my invenV a lm retort on which yconv'olutions of film alonetion is to provide `cameras `With a .rewinding ere-Wound. q i 1 25handle which is normally `positioned inan` ini- Referring now to Fig. 1,the camera may comV operative position blutwhen moved to an opera@ SistOia Camere body POIJJOII 011 the tOi) Wall tive positionit will not'only`rewind filmbut the 0f `which there is a.- housing 2 which ris adaptedmvement;` tg the Operative p0siti0n will gut()-4 tO enclOSe parts 0f themechanism-Such as the matically clutch and unclutch the proper parts ofrange finder. and shutter control. mechanism not 30 the camera so thatthe camera is in position forl Shell/I?, A.The 4'Opening 3 in thehousing is'y the `the lm to be rewound. Still another object `of,,Viewflnder Opening and the opening 4 is thev my invention isI to'provide a'rcamera in which Opening fOr the range nder. l

' the rewinding ilm'handlefisso arranged thatrif The Camera iS OftfleUsual` type in which an it is aocidentauy left man operative posnoneit.`exposure frame. 5 1s provided in the rear lwou s 35 is impossible'mtowind nlm on' a take-up spool., of thecamera, and spool chambers 1 and8vare A still further objectofmy invention is to preprovided at `ewh rSide0f the exposure .frame 5, vent the film from being rewoundvuntil thefilm Chamber 'l fOI' the Supply SPOOl 0f f11m.'8nd.0ham Windingmechanism for" the take-up spoolis'mdisber 3 i011 t'lhe take-up 5130010f 40 engaged, and other objects will appearvfrom the .I haveillustrated in spool chamber vI the illm 40 following specification, thenovel features being retort 9 Q1' afknOWIl type in Which 8- Supply filmparticularly pointed out inthe claims'at .thejvendr spool Hlis mounted.the film F being drawn bethereof. l y N l tween light-,tight lips H ofthe retort'acrossthe Coming now to the drawing-,wherein'like ref' fexposure frame 5. and being wound up on the erence characters denotelikeparts throughout, take-up spooldesignated broadly as I2.` In cam. 45Fig. f1 isa rear-elevation oil a camerawith the `v eras of` this type,the spool; I2 may be permacamera back removed, constructed in accordancenently attached to thecamera because the film is with and embodying apreferred form of' my inalways returned to the supply roll IIJ afterexvention. `Film winding mechanismpartially carposure. f i

ried by the camera back and by the camera body Ifprovide two separate lmwinding. mecha- 50 r is diagrammatlcally shown in this ngurefin bro-kynisxns, one for normal usein moving' the `ilm ken lines. .i betweenexposures from the supply spool to the Fig. 2 isa somewhat simplifiedsectionalvview take-up spool and the other for .rewinding'lm vthroughthe camerashown in Fig. 1, thev section from the take-up spool to thesupply spoollafter i u being drawn ony line 22. film has been exposed.

is the same as the film Winding mechanism shown in my copendingapplication Serial No. 137,483,

filed April 17, 1937, for Camera winding device.V

So that the present invention may be completely understood, I havediagramatically illustrated such parts of this film winding mechanism asare necessary for a complete understanding of the present invention.

The camera back I3, as shown in Fig. 2, carries a shaft I4 which may beoscillated by a lever I5. Shaft I4 carries afhxed thereto a ratchetwheel I8 which is normally engaged by a pawl I'I pressed by a spring I8into contact with the ratchet teeth so that when the ratchet is moved ina clockwise direction, a dished gear I9 will be moved to wind up filmthrough the following gearing. A gear 20 meshes with the dished gear I9,this gear being aflixed to the shaft 2| and meshing with a second gear22 which in turn meshes with a gear 23 mounted upon the shaft 24.

'Ihe shaft 2| passes through a sleeveshaft 25 and terminates in a clutchmember 28 which is adapted to engage a clutch member 21 carried by thesprocket wheel 28. The opposite sprocket wheel 23 is connected tosprocket 28 by means of the sleeve shaft 25. Thus, .when-the handle I5is oscillated, the sprocket which is composed of the wheels 28 and 23 isturned to measure off a length o! exposed film and the shaft 24 isturned. v

This shaft is connected to a suitable overrunning clutch 'mechanism 25'"with the take-up spool I2 so that the sprocket and take-up spoolmaymove together for winding film on the latter as is fully described in mycopending application.

In order for the sprocket and take-up spool to turn. it is `necessaryfor the clutch elements 28 and 21 of the sprocket and 30 and 3|-of thetakeup spool to be engaged. This position is shown in Fig. 1. It shouldbe noted that the clutch element 30 is on a shaft which may move axiallythrough the spool I2, this shaft terminating in an annular groovedmember 32 in which the end 33 oi' the clutch connecting member 34 isengaged. This member is in 'the form of an elongated lever pivoted uponthe stud 35 and carrying a lug 36 which extends into the grooved annularmember 31 which controls the clutch element 28. When the'lever 34 is inthe position shown, the two clutch elements are in driving engagement.There is a third clutch element control between lever 34 and this clutchcontrols the movement of the supply spool It. As will be noted from Fig.3, the supply spool I is provided with a transverse rod 40 which extendsacross the hub member 4I ofthe spool and .forms one clutch element, theother clutch element 42 being a notched tubular member pressed upwardlybythe spring 43 but held against movement by the grooved roller 44 inwhich the end 45 of the lever 34 is engaged. As will be seen from Fig.3, the clutch is disengaged since the lever 34 is in the position shownin Fig. 1. However. if this Vlever should be rocked about the stud 35 todisengage the sprocket clutchelements 26 and 21 and the adjacent take-upspool clutch elements 30 and 3l. the same movement which disengagesthese two clutches will engage the clutch ele ments 40 and 42.4 Thuseither the-supply winding mechanism or the take-up winding mechanism maybe operated but both of these cannot be operated at the same time.

In orderto control the movement of the clutch connecting member 35, Iprovide a cam 50 which forms a part of the film rewinding handle I whichis pivoted on a shaft 52 and which carries a handle 53 which may turnupon the shaft 54. This rewinding handle is thus foldably mounted on thebottom Wall 55 of the camera and when in its usual inoperative positionit lies flat against the bottom wall as indicated in Figs. 1 and 5.

However, after the film has been exposed and has been wound on thetake-up spool I2 and it is desired to return the film to the supplyspool III, which may or may not be enclosed in a retort 3. the handle 5Iis turned about its shaft 52 into an operative position. This movementcauses the cam 50 to press upwardly upon the sleeve 5l thrusting thegrooved roller 44 upwardly and en gaging the clutch elements 4II and42'. At the same time the end 45 of the clutch connecting member 34moves upwardly. rocking the member about the pivot 35 and simultaneouslyreleasing the sprocket clutch members 26 and 21 and the;-

take-up clutch members )Land-8|. The entire operation of adjusting theclutch therefore takes place merely by moving the winding mechanismhandle to its operative position. This handle may then be rapidlyrotated to return the film F into the retort 9 and since the clutches ofthe sprocket and spool are disconnected, these members rotate freelyandv offer practically no resistance to the return movement of the film.As soon as the film has been completely returned to the supply spool I0,the retort 9 and the spool I0 may be removed from the supply spoolchamber v'I and a fresh spool substituted therefor. The lm may then bethreaded in the usual manner by attaching the end of theiilm to the slot58 of the spool I2 and the camera back may be pressed on the camera..

If the operator has forgotten to fold the handle 5I flat against thecamera bottom wall 55, it will be impossible for the main windingmechanism. which is the oscillatable lever I5. to wind film on the spoolI2. The handle I5 will move freely until the take-up spool clutch isengaged. This is accomplished merely by folding the supplevmentary'lmwinding mechanism-including the handle 53 and the arm 5I flat againstthe camera body. This withdraws the cam 50 from beneath the sleeve 58and permits the clutch connecting lever 34 to rock about its pivot 35under the im` pulse of a spring 60 which tends to return the clutchconnecting member to the position shown in Fig. 1 in which the sprocketand take-up clutches are automatically engaged.

I am aware that cameras have been proposed inl which a film winding keyis carried at each end of the camera so that film may be wound forwardand backward and I am not claiming this feature broadly but considerthat my invention is primarily directed to the automatic control of theclutches vwhich in turn control the two nlm winding mechanisms shown anddescribed. It is obvious that various changes can be made in thespecific form and construction of the parts necessary to accomplish thedesired function and I consider as within the scope of my invention allsuch changes as may come within the scope of the appended claims.

What I claim is:

1. A roll holding device for cameras including spool chambers spaced byan exposure frame, winding mechanisms for both spool chambers, asprocket connected to one winding mechanism and adjacent one spoolchamber, handles for separately operating both winding mechanismsmanually,a mount for one'of said handles on Vwhich Iila/'may be foldedto and from an operable position, connections between the winding mech-4anisrns operable uponvmoving the foldable lwinding handle upon itsmount to an operable posi- `2..A,rollvho1ding device for camerasincluding spool chambers spaced by Lan exposure frame,

winding mechanisms for botnispo chambers, a Y sprocket connected to onelwinding mechanism ,and a'djacent one spool chamber, handles forseparatly operating both winding mechanisms manually, a mount for-one ofsaid winding mchanism` handles on which itmay be moved to and from anoperableposition," connections between Y the ywinding mechanisms*operable upon ,moving the foldable winding/.handle upon its mount to anoperable .position for disconnecting the other winding mechanism wherebyfilm may be wound in ai reverse direction, said mount for thewindingfrnechanism handle including a member engaging said connections.between the winding mechanismsand preventing the operation of thesprocketand adjacent spool, .except when said `handle is movedy on itsmount and is folded `into `an inoperativeposition.l 1

3."A` roll holdingl device-for 'cameras including spool chambers spacedby an` exposure frame, winding mechanisms for both( spool chambers, asprocket connected toone winding mechanism and adjacent one spoolchamber, handles for separately operating both winding mechanismsmanually, agmount for one of said handles on which it may be movedto andfrom an operable position, connections between the winding/mechanismsoperable upon moving the foldable'" handle upon its mount to anoperablefposition for disconnecting the other winding mechanism wherebyfilm may be'wound in a reverse direction, said foldable handle mountincluding a member engaging said connections between the windingmechanism and preventing the operation ofthe sprocket and adjacentspool, except when said handle is folded into an inoperative position,and spring means for moving the winding mechanism f e connectionswhereby the manually operable winding ymechanisms for the sprocket andadjacent spool may be operated to wind iil'm thereon.

4. In a roll holding device for cameras includvring an exposure framewith spool chambers at each* end, the combination with two manuallyoperable iilm winding devices, one for each spool chamber, oneconstituting a main winding device and including a take-up spool onwhich lm may be moved as exposed,v and the other constituting'v -asupplementary winding device adapted to rewind lmon'theoriginal orsupply spool, a foldable handle for the supplementary winding device, aclutch mechanism-for each spool adapted to engagefonly onewindingmechanism and spool ,at a time, and meansoperable by unfoldingthe foldable handle for operating the clutch mechanism releasing themain Aiilrn winding mechanism and connecting the supplementarylnrwlnding mechanism with the Auniolded winding handlemhereby exposedfum may be returned te the supply spool.

5. In a roll holding device for cameras including any exposure framewith spool chambers at each end, the combination with ytwo manuallyoperable film winding devices Vone for each spool chamber, oneconstituting a main winding device and including a take-up spool onwhich nlm may u be moved as exposed and the other constituting a.'I

supplementary winding device adaptedto yrewind, film onV the original orsupply spool, a measuring sprocket adapted to turn with the mainwindlngmechanism and operatively connected thereto y sprocket turn idly. f

, 6. vIn a'roll holding device foy cameras including anexposure framewithr` spool chambers at each end, the combination with two manuallyoperable iilm winding devices one for each' spool chamber, oneconstituting a main` winding device and including a take-up spool onwhich nlm may beV moved as exposed and the other constituting asupplementary winding device adapted to rewind vfilm on the original orsupplyspool, a measuringsprocket adapted to turnl with the `mainA.winding mechanism and operatively connected thereto through a clutch, afoldable-handie for the supplementary winding device. a clutch mechanismfor,y each spool, and connectionsbetween the thre clutches forsimultaneously operating.y the take-up spool `and sprocket'clutches inan .opposite direction to the supply spool clutch, a cam carried bythefoldable handle, said clutch ,connections being operated by said cam inmov- 'ing the handle to an operable position 4whereby the main filmwinding mechanism.

f7. In a roll holding" device for cameras including an` exposure frameland spool chambers at each endthereof, the lcombination with a supplyand a take-up spool, one mounted in each spool chamber, of a filmsprocket, mounted adjacent one'spool chamber, the axes of the spools andsprocket being parallel, three clutch members axially arranged withrespect to the spools and sprocket each movable to and from an operativeposition,l clutch connecting" means for causing the lsprocket andtake-upl clutches to operatively engage as the supply spool clutchdisengages and vice versa, film spool winding mechanisms axiallyarranged with respect to the two spools and sprocket, a fllmwin'dinghandleV foldably carother spool chamber, a take-up sprocketmounted nearsaid take-up spool, a clutch for the sprocket, means for turning saidtake-up spool u and sprocket to wind film on the take-up spool as thelsupply reel runs free, and connections between the three clutch membersincluding a lever arm, a pivotal mount for the lever arm between thespool chambers and including three lugs adapted to operate said clutchmembers to and from a position in which the take-up spool and sprocketclutches may be engaged and the supply spool clutch may be released byrocking said lever upon its pivot.

9. In a roll holding. device for cameras including han' exposure frameand spool chambers at each end thereof, the combination with a supplyspool and clutch mounted in one spool cham# ber, a take-up spool andclutch mounted in the other spool chamber, a take-up sprocket mountednear said take-up spool, a clutch for the sprocket, means for turningsaid take-up spool and sprocket to wind film on the take-up spool astheA supply reel runs free, connections' between the` three clutchmembers adapted to operate said clutch members to and from a position inwhich the take-up spool and sprocket clutches may be engaged and thesupply spool clutch may be released, said connections including a singlepivoted lever having three clutch engaging arms, and means for windingillm on the supply reel when the take-up spool and sprocket clutches areunclutched from their ilimwlnding means comprising a handleinterconnected to said supply spool.

10. In a roll holding device for cameras lncluding an exposure frame andspool chambers on each side, the combination with a. supply` spool and atake-up spool mounted in the spool chamber, of means for winding lm ontothe take-up spool and means for rewinding the film on the originalsupply spool including clutches on the supply and take-up spools, theclutch on the takeup spool being normally engaged, and a rewindingmember outside of the camera body pivotally mounted and adapted to bemoved on said pivot to and from an operative film rewinding position, aconnection between the two spool clutches and means operable by swingingthe rewinding member to an operative position for disconnecting thetake-up spool clutch and connecting the supply spool clutch.

1l. In a. roll holding device for cameras including an exposure framewith spool chambers at each end thereof, the combination with a supplyspool mounted in one spool chamber and a take-up spool lmounted in theother spool chamber, separate winding devices including manuali lyoperable handles for turning the supply and take-up spools. clutchesbetween each spool and winding device, means permitting the engagementof but one clutch at a time, one winding handle including a mount onwhich said handle may move to and from an operable winding position, andconnections between the winding devices operable by moving the handle onits mount to an operable position tor simultaneously operating theclutch members and disengaging the spool from the opposite windingdevice.

JOSEPH MIHALYI.

